Running venv Python script from PHP

Question

I am running many python scripts from PHP. My php script template as below:

<?php
setlocale(LC_ALL, "en_US.utf8");
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");

$command = escapeshellcmd("/usr/bin/python2.7 /path/to/script");
$args = escapeshellarg($_GET["title"]). " " . 
escapeshellarg($_GET["user"]);
$output = shell_exec($command . " " . $args);
echo $output;

But now I need to run some python scripts which are in virtual environment.

I tried to replace /usr/bin/python2.7 with ./www/python/venv/bin/python3, but it does not work.

So how to run it in PHP?

Please explain what you mean by "but it does not work".

Valentin Lorentz
– Valentin Lorentz

2018-12-31 10:35:05 +00:00
Commented Dec 31, 2018 at 10:35 — Valentin Lorentz
– Valentin Lorentz, Commented Dec 31, 2018 at 10:35
It means that Python script does not run.

Yethrosh
– Yethrosh

2018-12-31 10:39:52 +00:00
Commented Dec 31, 2018 at 10:39 — Yethrosh
– Yethrosh, Commented Dec 31, 2018 at 10:39
Do you get an error? If yes, which one?

Valentin Lorentz
– Valentin Lorentz

2019-01-01 11:32:37 +00:00
Commented Jan 1, 2019 at 11:32 — Valentin Lorentz
– Valentin Lorentz, Commented Jan 1, 2019 at 11:32

Blcknx · Accepted Answer · 2019-01-02 20:13:14Z

2

To really run venv you would need to do three steps in the shell:

Change into project root.
source venv/bin/activate
run python path/to/script

Prerequisite you already have prepared a virtual env for the project.

You could combine this three steps into a bash script and call this script from PHP.

edited Jan 2, 2019 at 20:13

answered Jan 1, 2019 at 8:55

Blcknx

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4 Comments

Yethrosh Over a year ago

Yes, this method works but it does not take $args variable. Any suggestion, please?

Blcknx Over a year ago

I am sure you can access the $args variable in the bash script you call. However bash scripts are not my realm. Should be easy to look that up. Probably this is the answer: stackoverflow.com/questions/2740906/…

Blcknx Over a year ago

Figure out which part does not work! Can't you receive the argument inside the script? Does it work on the shell? Then, does it work from PHP?

Yethrosh Over a year ago

Yes it perfectly works on shell, but does not in php. It seems that $args variable does not work.

PrakashG · Accepted Answer · 2019-01-03 06:40:15Z

1

Ideally You should use APIs, that is the best practice. But if you don't have API available you can use pipe.
That can be used like this function: exec_command($command) where,
$command = $command . " " . $args
Below is the code:

<?php
setlocale(LC_ALL, "en_US.utf8");
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");

$command = escapeshellcmd("/usr/bin/python2.7 /path/to/script");
$args = escapeshellarg($_GET["title"]). " " . 
escapeshellarg($_GET["user"]);

$command = $command . " " . $args;

$output = "";
$hd = popen($command, "r");
while(!feof($hd))
{
  $output .= fread($hd, 4096);
}
pclose($hd);

echo $output;

?>

edited Jan 3, 2019 at 6:40

answered Dec 31, 2018 at 11:00

PrakashG

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7 Comments

Yethrosh Over a year ago

Thanks for your reply. I am trying this but it throws <class 'importError'>.

PrakashG Over a year ago

@Yethrosh, Please remove the function and use function's code directly. And I'm sure enough that this <class 'importError'> is not because of this function exec_command() as I daily use this.

Yethrosh Over a year ago

Could you please update the above code as you said? :)

PrakashG Over a year ago

@Yethrosh, Please try the updated solution, and if it helps you then accept the answer.

Yethrosh Over a year ago

No, it does not goes in virtual environment.

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